Calculating machine



April 1942- c. M. F. FRIDEN CALCULATING MACHINE 3 Sheets-Sheet 1 Filed June 2, 1937 VIIIIII/III/IIIIIIIIIIIIIIIII/IflII/II/I/III/IIIIIIIII/I/IIfiI/Im II! lllla I INVEI JTOR. Car/ M. F Fr/aerr BY V ATTORNEY.

p 1942- c. M. F. F RIDEN CALCULATING MACHINE Filed June 2, 1937 3 Sheets-Sheet 2 l 1 M I INVENTOR. Car/ M Fr/oer7 April 14, 1942.

C. M. F. FRIDEN CALCULATING MACHINE Filed June 2, 1937 3 Sheets-Sheet 3' INVENTOR. Car/ M. Fr/a'en Patented Apr. 14, 1942 CALCULATING MACHINE Carl M. F. Friden, Piedmont, Calif., assignor to Friden Calculating Machine 00., Inc., a corporation of California Application June 2, 1937, Serial No. 145,979

1 Claim. ;(c1. 235-62) This invention relates to calculating machines, and is concerned more particularly with the provision of improved drive and drive control mechanism for such machines.

'It is a general object of the inventlon to provide a simple and re ble drive and drive control mechanism for a calculating machine.

Another object of the invention is to provide an improved calculating machine in which a rapid and incomplete depression of an operating key cannot cause misoperation of the machine.

Another object of the invention is to provide a calculating machine in which theforegoing objects are attained by means of a simple and economical construction.

Another-object of the invention is to provide a calculating machine having simple and reliable cyclic clutch means for controllin the drive therefor.

Other objects will appear from the following description taken in connection with the accompanying drawingsin which:

tion by suitable shifting means, such as indicated generally at I9, to change the ordinal relation of the registers to the actuating means therefor.

Within body or casing IS, the frame includes similar left and right side plates 2|, 22 (Figs. 1 and 2) which are suitably mounted on base 23 and are interconnected by a plurality of cross frame members 25, 21, 28 and 29. for supportingarious mechanisms including the selecting and actuating mechanisms described hereinafter.

'Ifhe'values to be introduced into the accumulator numeral wheels H are selected by means of a plurality of similar orders of selecting mechanism associated with numeral keys 3|. For this purpose, each'bank or order of keys 3| cooperates with a pair of similar parallel spring-urged value Fig. 1 is a longitudinal sectional elevation, of

the selecting, actuating, accumulating and counting mechanisms.

Fig. 2 is a fragmentary plan view of the selecting and actuating mechanisms, taken in a plane indicated by the line 2-2 in Fig, the actuating cylinders being shown schematically.

Fig. 3 is a transverse sectional elevation of a part of the selecting and actuating mechanisms, and is taken as indicated by the line 33 in Fig. 1, the teeth of the rear actuating cylinder being omitted.

Fig. i is a fragmentary elevational view of the clutch and drive means.

Fig. 5-is a fragmentary elevational view of the plus and minus keys and the latch means therefor.

Fig. 6 is a sectional view of the clutch and associated mechanism and is taken in the plane of the line H in Fig. 5. a

Fig. 7 is an elevational view of the plus and minus keys and the pi -minus slide controlled thereby. 1

The invention isdescribed as embodied in a preferredformandasadaptedtoa'momastype calculating machine. Referrhrg to Fig. 1,. the machine includes body IS in which the actuating, selecting, and control mec are moimted, and carriage Ii which is moimted for endwise movement transversely of body I! and which carries ninneral wheels l1 and ll of the accumulator and revolutions coimter, vely. Carriage It may be shifted in either direcselecting slides 32 (Figs. 1-3) mounted for endwise movement by a suitable linkage and extending through suitable slots in cross frame mem; ber 29. Each slide 32 is provided with cam sur faces of varying inclination for cooperation with suitable pins on certain of keys 3| to effect a differential movement of slide 32 on depression of a key 3|, one slide 32 of each order cooperates with the 1" to 5 keys 3| of a bank, while the other slide 32 of an order cooperates with the to 9 keys of the bank. Each bank of keys 3| has a latching slide 33 of conventional construction associated therewith to latch any depressed key 3I releasably in depressed position against the tension of the spring associated therewith. Each slide 32 is connected at its rear end with a ten-tooth selecting gear- 34 slidably and non-rotatably mounted on square selecting shaft 36, whereby movement of a slide 32 serves to position the associated gear 34 on shaft 36 with respect to stepped teeth 31 of the associated actuating cylinder 38 in accordance with the value of thedepressed numeral key.3 I A pair of actuating cylinders 38 for adjacent orders of the .machine are mounted on each actuating shaft 33, which is suitably journalledin cross members 23 and 23 and has a bevel gear connection 40 with transverse shaft 41. Shaft 4| is operable cyclically in a single direction from clutch controlled driving means as described hereinafter.

As seen in Fig. 2, the pair of selecting shafts 35 associated with each actuating shaft 39 are posiidoned above 'and to either side thereof, while the sets of gears 3i on'respective selecting shafts 36- are offset longitudinally of the machine for cooperation with'the similarly ofiset actuating cylinders 38. By the above arrangement and upon each rotation ofthe actuating means, a

selected number of increments of movement can be imparted to each selecting shaft 36 by the operation of the actuating mechanism can be associated actuating cylinder 36 in accordance determined by oscillation of clutch control lever with the adjusted position of gears 34. 8|. Simultaneously with movement of control Each selecting shaft 36 is suitably journalled lever 8|, the circuit for motor 6| is established in cross members 26, 28 and 29, and between by means of link extension 9| (Fig. 4) of lever members 26 and 28 has associated therewith 92 pivoted at 93 on side plate 22. At its lower selectively settable plus-minus gears for driving end lever 92 is pivotally associated with lever 94 an aligned numeral wheel I1. The plus-minus pivoted at 95 on plate 22 and having pin 96 of gears of each order of the machine comprise a insulating material overlapping one of spring spool 55 (Figs. 1 and 2) slidably and non-rotatcontacts 91 of the motor circuit. Thus, moveably mounted on shaft 36 and having opposed ment of clutch control lever 8| simultaneously bevel gears 52, 53 arranged for selective engageconditions the clutch and the motor circuit. ment with similar gear 54 on numeral Wheel shaft Means are provided for selectively determining 55. The engagement of gears 52 and 53 with gear positive or negative registration on the numeral 54 is controlled by strap 56 which extends transwheels in the form of plus key I0| (Figs. 5 and versely of the machine between each set of plus- 7) and minus key I02 which are slidably mounted minus gears 52, 53 and is mounted by a pair of for endwise movement by suitable studs on plate similar arms 51 for rocking movement with shaft 13, and are urged to raised position by respective 58, which is suitably journalled in side plates 2|, springs I03. Depression of either of keys H, 22. Shaft 58 is controlled in a manner herein- I02 servesto engage the clutch, close the motor after described to determine positive registration circuit, and select the sign character of the regisby meshing gears 52 with gears 54, and negative tration. registration by meshing gears 53 with gears 54. To enable the drive, keys IOI and I02 (Fig. 5) In the neutral position shown in Fig. 1 in which have respective pins I04 in operative relation gears 52 and 53 are held normally by suitable with cam surfaces I06 on clutch control slide I01 spring urged centralizing means, carriage shiftwhich is suitably mounted for endwise movement ing can be effected. on plate 13. To effect control of the clutch and During both additive and subtractive registrathe motor circuit by such movement of slide I01,

tion of values in numeral wheels I1, suitable pin I08 (Figs. 4 and.7) on the upper arm of transfer mechanism indicated generally at 59 is clutch control lever 8| abuts the rear end of slide operative to effect the tens transfer. I01, so that rearward movement of slide I01 As stated above, the actuating means is operoscillates lever 8| in a clockwise direction as able cyclically to effect registration in the acviewed in Fig. 4 to release clutch pawl 16 for cumulator of the values set into the machine by engagement with drive ratchet 61, and to close depression of the numeral keys. For this purpose contacts 91.

a clutch controlled drive is provided for the It will be noted that roller 86 in maintaining actuating mechanism, which preferably forms the control lever 8| in clutch engaging position when sole drive means for all operating parts of the the actuating means is out, of full cycle posimachine. The source of power of the drive means tion, also serves to maintain contacts 91 closed comprises electric motor 6| (Fig. 1) having drive so that the motor circuit can be interrupted only shaft 62 carrying drive gear 63 (Fig. 4) which in or adjacent the full cycle position of the parts. is connected by gear 64 with gear 65 journalled To determine the sign character of the regisby flanged collar 66 (Figs. 4 and 6) on transverse tration, plus and minus keys II and I02 (Fig. 7 shaft 4| and having driving clutch member or have respective rollers III, disposed in operative ratchet 61 formed on the hub thereof. The 4 relation with opposed cam surfaces III on plusdriven clutch member comprises disc 68 having minus slide H3. Slide II3 is mounted for endits hub pinned on shaft 4| and ring 69 secured wise movement at its front end by link H4 and in spaced relation from disc 68 by suitable studs at its rear end by one of arms 51 on shaft 58. 10. Disc' 68 is journalled in bearing 1| secured As described above, arms 51 on shaft 58 (Figs. in side plate 22 and engages the hub of gear 65 5o 2 and 3) carry transversely extending strap 66 and the end of collar 66, which has its opposed which controls the engagement or disengagement end in abutting relation with the hub of gear of gears 52 or 53 with numeral wheel gears 54. 12 secured on shaft 4| and journalled by a suit- Thus, depression of plus key |0I moves slide III able b in i fr m pl e 13. rearwardly of the machine and rocks shaft 58 The driven clutch member carries a drive and strap 56 to effect meshing of gears 62, I4, establishing element in the form of pawl 16 which determining positive registration on numeral is pivoted at one end between disc 68 and ring wheels I1 of the value set in the keyboard. Sim- 69 on one of studs 10, and has an arcuate slot 11 ilarly, depression of minus key I02 determines adjacent its other end engaged by another of one or more negative registrations of such values studs 10. Pawl 16 is-urged to active position by by meshing gears 53, 54 upon forward movement spring 18- and intermediate its ends has tooth 19 of plus-minus slide II3. for engagement with the teeth of ratchet 61 to A conventional full-cycle lock means is assoestablish the drive connection. Pawl "is reciated with the plus-minus slide III to insure strained from movement to active position in the meshing of plus-minus gears 62 or 68 with nuneutral or full cycle position of the parts by meral wheel gears 54 throughout a complete cycle clutch control lever 8| pivoted at 82 on side after the gears have been positioned by plus key plate 22 and having a nose or stop 83 for engage- II or minus key I02. One form of such tullment with shoulder 84 at the free end of pawl cycle lock means is shown in my Patent 2.229.869, 16. Lever 8| carries roller 86 which seats in dated January 28. 1941. As shown herein, 'the depression 81 on ring 69 in the full cycle posifull-cycle lock means includes a pin III (Figure tion thereof, and in other positions thereof is '7) carried by one of arms 51 and adapted to coengaged with the periphery of ring 69 to mainoperate with a suitable notched disc (not shown) tain lever 8| in its clutch engagingposition for on one of actuating shafts 38. The pin H5 is a purpose later referred to. 1 adapted for positioning at one side or other of It is seen, therefore, that one or more cycles of the disc upon endwise movement of plus-minus slide H3 to plate 13 and has respective latch below respective cam surfaces lllfor cooperation with pins I20 on keys llll, I02. Pins have their upper surfaces flat for engagement with shoulders H8 and, upon depression of a key, the associated pin I20 serves to cam latching slide Hi to the left as viewed in Fig. 5 against the tension of the right-hand spring I03 as viewed in Fig. 5 which engages ofiset portion l2! of slide H6. In the pin of the depressed key will shoulder H8 to hold whereby full depression of .the the drive is required.

To effect release 0! the depressed key, latching slide H6 has oflset cam follower extension l2! engaging cam I22, which is secured on gear 12. Extension I2! is held against the cam by the adjacent spring 03. The contour of cam I22 is such that the key will be released aiter substantially halt the ensuing cycle 0! operation.

While I have shown and described my invention in connection with a preferred embodiment I operation.

thereof, it'will be understood that such invention is capable of variation and modification, so that the scope of the invention should be limited only by the appended claim.

I, therefore, claim as my invention:

In a calculating machine having numeral wheels, cyclically operable rotary actuating means therefor oi the uni-directional type, settable plusminus gearing interposed between said numeral wheels and said actuating means, and full cycle mechanism for maintaining the setting 'of said plus-minus gearing during each cycle -of operation of said actuating means; respective plus and minus keys mounted in juxtaposed relation for endwise sliding movement, a plus-minus slide connected to said plus-minus gearing and operable by either of said keys, means controlled by said keys for driving said actuating means through one or more cycles of operation without interruption in response to manual depression of a key and to manual release 01 the depresse key, a common latch slide for said keys, yieldable to active position, and in time with said actuating means for moving said slide to inactive position during each cycle of operation of said actuating means, said latch slide insuring maintenance of said settable gearing in set position at the beginning of a cycle of operation until said i-ull cycle mechinsuring 

